\safemath{\txant}{m_{\mathrm{t}}} %number of transmit antennas
\safemath{\txantalt}{\widetilde{m}_{\mathrm{t}}}
\safemath{\rxant}{m_{\mathrm{r}}} %number of receive antennas
\safemath{\cohtime}{n_{\mathrm{c}}} %time-frequency coherence length (in symbol times)
\safemath{\bl}{n} %blocklength
\safemath{\err}{\epsilon} %error rate
\let\snr\undefined
\safemath{\snr}{\rho} %snr
\safemath{\tfdiv}{l}  %amount of time-frequency diversity available (number of independent fading realizations observed over a codeword)
\safemath{\ncod}{M}
% \let\complexset\undefined
% \safemath{\complexset}{\amsbb{C}}
% \safemath{\realset}{\amsbb{R}}
% \safemath{\naturalset}{\amsbb{N}}
% \safemath{\Rmax}{R^*}
% \safemath{\Rmaxala}{R^*\sub{ala}}
% \safemath{\Rmaxp}{\Rmax(\tfdiv,\cohtime,\epsilon,\snr)}
% \safemath{\Rmaxalap}{\Rmaxala(\tfdiv,\cohtime,\epsilon,\snr)}
% \safemath{\Cerg}{C\sub{erg}}
% \safemath{\Cout}{C\sub{out}}
% \safemath{\Pout}{P\sub{out}}
% \safemath{\diversity}{d}
% \safemath{\multiplexing}{r}
% \safemath{\Pustm}{P_{\rmatX}^{\mathrm{u}}}
% \safemath{\maxantalt}{p}
% \safemath{\minantalt}{q}
% \safemath{\altgamma}{\widetilde{\gamma}}
% \newcommand{\infoden}[2]{\ensuremath{\imath\lefto({#1};{#2}\right)}}   % expectation
% \safemath{\alshouffle}{e}

